Don't depend on kotlinx-coroutines-swing (#515)

Because it overrides Dispatchers.Main

Fixes https://github.com/JetBrains/compose-jb/issues/1943 on skiko side

skiko/build.gradle.kts

@@ -273,9 +273,6 @@ kotlin {
 
         val awtMain by getting {
             dependsOn(jvmMain)
-            dependencies {
-                implementation("org.jetbrains.kotlinx:kotlinx-coroutines-swing:$coroutinesVersion")
-            }
         }
 
         if (supportAndroid) {
@@ -298,9 +295,6 @@ kotlin {
 
         val awtTest by getting {
             dependsOn(jvmTest)
-            dependencies {
-                implementation("org.jetbrains.kotlinx:kotlinx-coroutines-swing:$coroutinesVersion")
-            }
         }
 
         if (supportAndroid) {

skiko/src/awtMain/kotlin/org/jetbrains/skiko/HardwareLayer.kt

@@ -2,7 +2,6 @@ package org.jetbrains.skiko
 
 import kotlinx.coroutines.*
 import kotlinx.coroutines.channels.Channel
-import kotlinx.coroutines.swing.Swing
 import java.awt.*
 import java.awt.event.FocusEvent
 import java.awt.event.InputMethodEvent
@@ -110,7 +109,7 @@ internal open class HardwareLayer(
         // and its accessibility context. This timeout is used to deal with concurrency
         // TODO Find more reliable procedure
         resetFocusAccessibleJob?.cancel()
-        resetFocusAccessibleJob = GlobalScope.launch(Dispatchers.Swing) {
+        resetFocusAccessibleJob = GlobalScope.launch(MainUIDispatcher) {
             delay(100)
             _focusedAccessible = null
         }

skiko/src/awtMain/kotlin/org/jetbrains/skiko/MainUIDispatcher.awt.kt

+package org.jetbrains.skiko
+
+import kotlinx.coroutines.*
+import java.awt.event.ActionListener
+import java.lang.Runnable
+import java.util.concurrent.TimeUnit
+import javax.swing.SwingUtilities
+import javax.swing.Timer
+import kotlin.coroutines.CoroutineContext
+
+/**
+ * Dispatcher for UI thread, which is used in the current implementation of native UI integration.
+ * Currently, it uses Swing event dispatching thread.
+ */
+val MainUIDispatcher: CoroutineDispatcher
+    get() = SwingDispatcher
+
+/**
+ * Dispatcher for Swing event dispatching thread.
+ *
+ * Copy of Dispatchers.Swing from kotlinx-coroutines-swing.
+ *
+ * We don't depend on kotlinx-coroutines-swing, because it will override Dispatchers.Main, and
+ * application can require a different Dispatchers.Main.
+ *
+ * Note, that we use internal API `Delay` and experimental `resumeUndispatched`.
+ * That means it can be changed in the future. When it happens, we need
+ * to release a new version of Skiko.
+ */
+@OptIn(InternalCoroutinesApi::class, ExperimentalCoroutinesApi::class)
+private object SwingDispatcher : CoroutineDispatcher(), Delay {
+    override fun dispatch(context: CoroutineContext, block: Runnable): Unit = SwingUtilities.invokeLater(block)
+
+    override fun scheduleResumeAfterDelay(timeMillis: Long, continuation: CancellableContinuation<Unit>) {
+        val timer = schedule(timeMillis, TimeUnit.MILLISECONDS) {
+            with(continuation) { resumeUndispatched(Unit) }
+        }
+        continuation.invokeOnCancellation { timer.stop() }
+    }
+
+    override fun invokeOnTimeout(timeMillis: Long, block: Runnable, context: CoroutineContext): DisposableHandle {
+        val timer = schedule(timeMillis, TimeUnit.MILLISECONDS) {
+            block.run()
+        }
+        return object : DisposableHandle {
+            override fun dispose() {
+                timer.stop()
+            }
+        }
+    }
+
+    private fun schedule(time: Long, unit: TimeUnit, action: ActionListener): Timer =
+        Timer(unit.toMillis(time).coerceAtMost(Int.MAX_VALUE.toLong()).toInt(), action).apply {
+            isRepeats = false
+            start()
+        }
+}
\ No newline at end of file

skiko/src/awtMain/kotlin/org/jetbrains/skiko/redrawer/AbstractDirectSoftwareRedrawer.kt

@@ -5,6 +5,7 @@ import kotlinx.coroutines.*
 import org.jetbrains.skiko.FrameDispatcher
 import org.jetbrains.skiko.FrameLimiter
 import org.jetbrains.skiko.RenderException
+import org.jetbrains.skiko.MainUIDispatcher
 import org.jetbrains.skiko.SkiaLayer
 import org.jetbrains.skiko.SkiaLayerProperties
 import org.jetbrains.skiko.context.DirectSoftwareContextHandler

skiko/src/awtMain/kotlin/org/jetbrains/skiko/redrawer/AngleRedrawer.kt

@@ -3,6 +3,7 @@ package org.jetbrains.skiko.redrawer
 import org.jetbrains.skia.BackendRenderTarget
 import org.jetbrains.skia.DirectContext
 import org.jetbrains.skiko.FrameDispatcher
+import org.jetbrains.skiko.MainUIDispatcher
 import org.jetbrains.skiko.SkiaLayer
 import org.jetbrains.skiko.SkiaLayerProperties
 import org.jetbrains.skiko.context.AngleContextHandler

skiko/src/awtMain/kotlin/org/jetbrains/skiko/redrawer/MainUIDispatcher.awt.kt

-package org.jetbrains.skiko.redrawer
-
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.MainCoroutineDispatcher
-import kotlinx.coroutines.swing.Swing
-
-val MainUIDispatcher: MainCoroutineDispatcher
-    get() = Dispatchers.Swing

skiko/src/awtMain/kotlin/org/jetbrains/skiko/redrawer/SoftwareRedrawer.kt

@@ -3,6 +3,7 @@ package org.jetbrains.skiko.redrawer
 import kotlinx.coroutines.*
 import org.jetbrains.skiko.FrameDispatcher
 import org.jetbrains.skiko.FrameLimiter
+import org.jetbrains.skiko.MainUIDispatcher
 import org.jetbrains.skiko.SkiaLayer
 import org.jetbrains.skiko.SkiaLayerProperties
 import org.jetbrains.skiko.context.SoftwareContextHandler

skiko/src/jvmTest/kotlin/org/jetbrains/skiko/util/UiTest.kt

 package org.jetbrains.skiko.util
 
 import kotlinx.coroutines.CoroutineScope
-import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.runBlocking
-import kotlinx.coroutines.swing.Swing
 import org.jetbrains.skiko.*
 import org.junit.Assume.assumeFalse
 import org.junit.Assume.assumeTrue
@@ -16,7 +14,7 @@ internal fun uiTest(block: suspend UiTestScope.() -> Unit) {
 
     val renderApi = System.getProperty("skiko.test.ui.renderApi", "all")
 
-    runBlocking(Dispatchers.Swing) {
+    runBlocking(MainUIDispatcher) {
         if (renderApi == "all") {
             SkikoProperties.fallbackRenderApiQueue(SkikoProperties.renderApi).forEach {
                 println("Testing $it renderApi")